i think it's important not to exaggerate the acrow moany that we see in -- acrimony. it took us a long time to do the right thing in civil rights legislation. but we are seeing the perfection if i could use that term of the ways in which the two pears have become polarized in ways that overlap ideology, region and partisan and so the walls are getting thicker and thicker. and buzz of that it trickles down to the state level. and the gerrymandering that we see that reinforces the strength of people in particular pockets in the country means that most members now fear a primary challenge more than they fear a general election challenge and that gives all the incentives for ideolo gs to push -- gwen: is it fair to say that either side is being more intrasigent? >> yes, because they're a more ideological party. the block of conservatives is more than the block of liberals. the competition within the republican party has a higher of purity than democrats do. 60% of the votes that mitt romney got in 2012 were from people who call themselves conservatives. only 42% of the vo